Carter’s Selective Service law only included those men born after December 31st of 1959, which is why you didn’t have to register. I was born 34 days after the cutoff.
I was born in sixty-two. But I was already enlisted by the time Carter reinstated the draft.
Eight years or more of enlisted service gets you classified as 4-A, and I was also twenty eight years old by the time I got out.
I wasn’t required to register when I got out, but I had served as a 2884, a 2171, and an air force 30451. If there were an emergency great enough and techs were critical they might have over ridden the 4-A exemtions, but in late ‘91 with the Soviets newly collapsed they weren’t tracking us and we weren’t called upon to register if our MSO was long since filled.